op {
  graph_op_name: "Sub"
  endpoint {
    name: "Subtract"
  }
  endpoint {
    name: "Sub"
  }
  summary: "Returns x - y element-wise."
  description: <<END
*NOTE*: `Sub` supports broadcasting. More about broadcasting
[here](http://docs.scipy.org/doc/numpy/user/basics.broadcasting.html)
END
}
